Ophthalmic alterations in horses with leptospirosis by serovar Icterohaemorrhagiae in Rio de Janeiro, Brazil

Hamond, Camila; Martins, Gabriel; Abreu, R; Lilenbaum, Walter

doi:10.1590/s0100-736x2011000200009

Cited by 13 publications

(11 citation statements)

References 9 publications

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“…1999); (Faber et al 2000); (Donahue and Williams. 2000) Grippotyphosa, Icterohaemorrhagiae Europe (Donahue et al 1995); (Dwyer et al 1995); (Wollanke et al 2001) Bratislava, Icterohaemorrhagiae, Sejroe Sweden (Baverud et al 2009) Bratislava Mongolia (Odontsetseg et al 2005) Icterohaemorrhagiae, Copenhageni, Bratislava Brazil (Hashimoto et al 2007); (Braga et al 2011); (Coiro et al 2012); (Hamond et al 2012); (Pinna et al 2012); (Hamond et al 2013); (Pinna et al 2014) Icterohaemorrhagiae, Bratislava, Pomona Italy (Ebani et al 2012) Sejroe, Bratislava Korea (Jung et al 2010) Copenhageni, Bratislava Netherlands (Houwers et al 2011) Bratislava, Pomona Icterohaemorrhagiae Croatia Grippotyphosa, Sejroe Nothern Poland (Arent and KedzierskaMieszkowska. 2013) Copenhageni South-eastern Australia (Dickeson and Love.…”

Section: Common Serovars Affecting Horses and Their Geographical Locamentioning

confidence: 99%

A study of leptospirosis in South African horses and associated risk factors

Simbizi

Saulez²,

Potts

et al. 2016

Preventive Veterinary Medicine

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between potential risk factors and both seropositive horses to the predominant serovar Bratislava and to Leptospira spp were statistically evaluated using univariable analysis and multivariable logistic regression models.Adult horses admitted to each equine hospital and horses seen on ambulatory service for various purposes were included in the study. Severely-ill, chronically infected, and horses with underlying immunosuppressive conditions were excluded from sampling, to control for potential bias.A total of 663 horse sera were collected and tested against a panel of 24 leptospiral serovars using the microscopic agglutination test. The most predominant serovars in Gauteng were The apparent prevalence to one or more serovars of Leptospira spp at a serum dilution of 1:100 in Gauteng, KwaZulu-Natal and Western Cape Provinces was 49%; 37% and 32% respectively. The true prevalence was calculated for each province taking into account the clustering effect during the sampling and was found to be between 24-74% in Gauteng; 26-39% in the Western Cape and 20-54% in KwaZulu-Natal.iv Nooitgedacht (South African horse breed) horses were found to be at greater risk of being seropositive to both serovar Bratislava (OR=5.08) and Leptospira spp (OR=6.3). Similarly, horses residing on properties with forestry in the vicinity were found to be at greater risk of being seropositive to both serovar Bratislava (OR=9.3) and Leptospira spp (OR=5.2). This study has shown that a high proportion of horses in South Africa are exposed to a wide range of serovars, inferring a complex epidemiology. It also describes for the first time new serovars of Leptospira in South African horses that have not previously been reported.v

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Section: Common Serovars Affecting Horses and Their Geographical Locamentioning

confidence: 99%

A study of leptospirosis in South African horses and associated risk factors

Simbizi

Saulez²,

Potts

et al. 2016

Preventive Veterinary Medicine

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“…(Sellon & Long, 2007). In this species, the disease is most often asymptomatic and when clinical signs are present, they may be confused with other diseases (Hashimoto et al, 2007;Braga et al, 2011). Leptospirosis can cause reproductive disorders and physical weakness, as well as recurrent uveitis, also called periodic ophthalmia (Braga et al, 2011), and is considered the greatest worldwide cause of blindness in equines (Artiushin et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution of equine seroreagent to Leptospira spp. in Northeastern Brazil

Morais¹,

Bezerra²,

Anjos³

et al. 2020

Braz. J. Vet. Res. Anim. Sci.

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Considering the importance of leptospirosis in both equine husbandry and public health, as well as the relevance of knowledge of current serogroup and the small number of studies addressing this disease in equines in Northeastern Brazil, the present study performed a serological survey of Leptospira spp. in a serum bank of 1,267 equines originating from 177 municipalities, located in four states in Northeastern Brazil: Ceará, Rio Grande do Norte, Paraíba and Pernambuco. The microscopic agglutination test (MAT) was used for diagnosis of leptospirosis using 24 serovars as antigens. The frequency of reagent equines was 29.7% (376/1,267), and 68.9% (122/177) of municipalities had at least one positive reaction. The serogroups reagent were Australis (37.2%), Icterohaemorrhagiae (29.3%), Tarassovi (9.6%), Sejroe (5.8%), Pomona (5.3%), Grippotyphosa (4.5%), Pyrogenes (2.4%), Bataviae (1.9%), Ballum and Hebdomadis (1.3%), Mini (0.5%), Celledoni, Shermani, and Javanica (0.3% each). There were significant statistical differences regarding sex and age, with a higher frequency in females (P= 0.014), and in animals ≥ 6 years (P=0.001). We concluded that seropositivity to Leptospira spp. is high in equines in Northeastern Brazil, with a predominance of serologic reactions to the Australis serogroup in the border areas between the states, and the Icterohaemorrhagiae serogroup in coastal areas or their vicinity. The high degree of seropositivity found points to the need to implement prophylactic strategies, both intraspecies infection prophylaxis and rodent control. We also recommended avoiding animal crowding and separating animals according to sex and age group during handling.

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“…Some authors, such as Pinna et al (2008), consider equids as the main reservoirs for the Australis serogroup. Although these animals are generally asymptomatic (SANTOS et al, 2012), Braga et al (2011) point out some indicators of infection by Leptospira sp. in equids: abortion, weak neonates or premature fetuses, and recurrent uveitis, also known as periodic ophthalmia.…”

Section: Introductionmentioning

confidence: 99%

Leptospirosis in donkeys (Equus asinus) destined for slaughter and export

Morais¹,

Júnior²,

Nunes³

et al. 2019

SCA

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Brazil is the eighth largest exporter of equidae meat in the world. Most donkey meat is obtained from discarded animals, raising concerns about their health status, particularly regarding zoonotic infections such as leptospirosis. Thus, this study aimed to determine the frequency of anti-Leptospira sp. antibodies in Northeastern donkeys at two properties specializing in producing donkeys for slaughter and export to the Chinese market, in the municipalities of Parnamirim (A) and Araripina (B), both located in the mesoregion of the Sertão of Pernambuco, Northeastern Brazil. The serum of 349 donkeys was collected, including 147 males and 202 females, aged 3 to 12 years. All animals were subjected to the Microscopic Agglutination Test (MAT) using a cut-off point of 1:50. A total of 19.8% seropositive animals were obtained. The Icterohaemorrhagiae serogroup was the most found in this study (40.6%), followed by Australis (27.5%), Autumnalis (8.7%), Sejroe (8.7%), Pomona (8.7%), Celledoni (2.9%), and Tarassovi (2.9%). A higher overall rate of seropositivity was found in donkeys from property B (2.2.4%) in the municipality of Araripina. In the association analysis, it was observed that animals less than 9 years of age were more likely to be seropositive, this may be due to the acquisition of resistance to Leptospira sp. as age advances. A significant number of donkeys seropositive for Leptospira sp. was found, thus, breeding these animals for slaughter and export requires implementing prophylactic measures.

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Ophthalmic alterations in horses with leptospirosis by serovar Icterohaemorrhagiae in Rio de Janeiro, Brazil

Cited by 13 publications

References 9 publications

A study of leptospirosis in South African horses and associated risk factors

A study of leptospirosis in South African horses and associated risk factors

Spatial distribution of equine seroreagent to Leptospira spp. in Northeastern Brazil

Leptospirosis in donkeys (Equus asinus) destined for slaughter and export

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